strcasecmp(3) - NetBSD Manual Pages

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STRCASECMP(3)           NetBSD Library Functions Manual          STRCASECMP(3)


NAME

     strcasecmp, strncasecmp -- compare strings, ignoring case


LIBRARY

     Standard C Library (libc, -lc)


SYNOPSIS

     #include <strings.h>

     int
     strcasecmp(const char *s1, const char *s2);

     int
     strncasecmp(const char *s1, const char *s2, size_t len);


DESCRIPTION

     The strcasecmp() and strncasecmp() functions compare the nul-terminated
     strings s1 and s2 and return an integer greater than, equal to, or less
     than 0, according to whether s1 is lexicographically greater than, equal
     to, or less than s2 after translation of each corresponding character to
     lower-case.  The strings themselves are not modified.  The comparison is
     done using unsigned characters, so that `\200' is greater than `\0'.

     The strncasecmp() function compares at most len characters.


SEE ALSO

     bcmp(3), memcmp(3), strcmp(3), strcoll(3), strxfrm(3)


STANDARDS

     The strcasecmp() and strncasecmp() functions conform to IEEE Std
     1003.1-2001 (``POSIX.1'').


HISTORY

     The strcasecmp() and strncasecmp() functions first appeared in 4.4BSD.


NOTES

     If len is 0 strncasecmp() always returns 0.

NetBSD 9.3                       July 11, 2016                      NetBSD 9.3